Don't delete p2096. Deleting the 420 code and a tune and it will go away. Bad things can happen if ur car decides to run lean for some reason and your CEL doesn't turn on. I am catless and I deleted the p0420 code and haven't had a 2096 code since then. What do u mean by smoother powerband? Is it like vtec or something? Just curious. The cams I'm looking at make power from 2k rpm to 6800 rpm